Toro Pro Force 44553, Operator'S Manual

Page: 29 / 44

Servicing the Spark Plugs
Ensure that the air gap between the center and side
electrodes is correct before installing the spark plugs.
Use a spark plug wrench for removing and installing
the spark plugs and a gapping tool/feeler gauge to
check and adjust the air gap. Install new sparks plugs
if necessary.
Type: Champion® RC12YC, Champion® Platinum
3071 or equivalent
Air Gap: 0.76 mm (0.030 inch)
Checking the Spark Plugs
Service Interval: Every 200 hours
1. Look at the center of the spark plugs ( Figure 27 ).
If you see light brown or gray on the insulator,
the engine is operating properly. A black coating
on the insulator usually means that the air
cleaner is dirty.
g001470
Figure 27
1. Center electrode insulator 3. Air gap—0.75 mm or 0.030
inch (not to scale)
2. Side electrode
Important:
Always replace a spark plug
when it has a black coating, worn electrodes,
an oily film, or cracks.
2. Check the gap between the center and side
electrodes (
Figure 27 ). Bend the side electrode
if the gap is not correct.
Removing the Spark Plugs
1. Shut off the engine, remove the key, and wait
for all moving parts to stop before leaving the
operating position.
2. Disconnect the spark-plug wires from the spark
plugs (
Figure 28 ).
g002358
Figure 28
1. Spark-plug wire 2. Spark plug
3. Clean around the spark plugs to prevent dirt
from falling into the engine and potentially
causing damage.
4. Remove the spark plugs and the metal washers.
Installing the Spark Plugs
1. Install the spark plugs and the metal washer.
Ensure that the air gap is set correctly; refer to
Checking the Spark Plugs (page 29) .
2. Tighten the spark plugs to 24 to 30 N∙m (18 to
22 ft-lb).
3. Connect the spark-plug wires to the spark plugs
(
Figure 28 ).
Cleaning the Engine Screen
and the Oil Cooler
Service Interval: Before each use or daily
Before each use, check and clean the engine screen
and oil cooler. Remove any build up of grass, dirt or
other debris from the oil cooler and engine screen
(
Figure 29 ).
g002355
Figure 29
1. Engine screen
2. Oil cooler
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